<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>

      <!-- 登录表单区域 -->
        <el-form ref="loginFormRef"  label-width="0px" class="login_form" :model="loginForm"  :rules="loginRules" >
          <!-- 用户名 -->
          <el-form-item  prop="username">
            <el-input   prefix-icon="el-icon-user" v-model="loginForm.username"></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password" >
            <el-input type="password" prefix-icon="el-icon-lock" v-model="loginForm.password"></el-input>
          </el-form-item>
          <!-- 按钮 -->
          <el-form-item class="btns">
            <el-button @click="login" type="primary">登录</el-button>
            <el-button @click="resetLoginForm" type="info">重置</el-button>
          </el-form-item>
        </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username:'admin',
        password:'123456'
      },
      loginRules: {
        username: [
          {required: true, message: "请输入用户名", trigger: "blur"},
          { min: 2, max: 16, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          {required: true, message: "请输入密码", trigger: "blur"},
          { min: 5, max: 16, message: '长度在 5 到 16 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields();
    },

    // 点击登录按钮
     login() {
      this.$refs.loginFormRef.validate(async valied => {
        if(!valied) return;

        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error("登录失败!")
        this.$message.success("登录成功")

        // 将token保存到sessionStorage
        console.log(res)
        window.sessionStorage.setItem("token", res.data.token)

        // 登录成功后,编程式导航 跳转页面
        this.$router.push("/home")
        
        }
        
      )
    }
  }
  
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    margin: 0 auto;
    margin-top: -70px;
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    background-color: #fff;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
  .btns {
    display: flex;
    justify-content: flex-end;
  }
  .login_form {
    position:absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
  }
}
</style>